Improvement in petroleum cooking and heating apparatus



3 Sheets-Sheet 1.

1.8. HULL.

Petroleum Cooking and Heating Apparatus.

, Patented Sept. 25 1866.

3 Sheets-Sheet 2. J. -S. HULL. Petrdleum Cooking and Heating Apparatus.

Patented Sept. 25,1866,

Wt z wessesx 3 Sheets-Sheet 3, J. S. HULL.

Petroleum Cooking and Heating Apparatus.

Patented Se t. 25,1866.

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UNITED STATES PATENT OEEIoE JOHN S. HULL, OF CINCINNATI, OHIO.

IMPROVEMENT IN PETROLEUM COOKING AND HEATING APPARATUS.

Specification forming part of Letters Patent No. 58,260, dated September2:", 1866.

To all whom it may concern:

Be it ltno'wn that I, JOHN S. HULL, of Oinoinnati, in the county ofHamiltonand State of Ohio, have invented a new and Improved Apparatusfor Cooking and Heating with Petroleum or other Hydrocarbon Fluids; andI do hereby declare that the following is a full and exact descriptionthereof, reference being had to the accompanying drawings, making partof this speciiication Figure 1 being a central vertical section of theapparatus as arranged for cooking; Fig. 2, a plan thereof, the cookingutensil being removed; Fig. 3,a central vertical section of theapparatus as arranged simply for heating; Fig. 4, a plan of the lowerpart thereof, including the burner.

Like letters designate corresponding parts in all of the figures.

In this apparatus [force the oil or other hydrocarbon fluid to theburner 0 through a pipe, B, from a reservoir in which atmosphericpressure is employed by condensation to drive the oil to the burner. Theburner gasifies the oil as it passes through its retort over and withinthe flame, so that a blowing jet of flame is produced, which may bevaried in intensity by increasing or diminishing the force of pressurein the reservoir, or by adjusting the needlepoint regulator c of thejetorifice.

lengthen or extend upward the flame as itissues from the burner to anyrequired distance by means of a succession of short open tubes, 1) E F,arranged and operating substantially as follows The lower tube, D,surrounds the burner 0 about as shown, and it is somewhat conical orflaring in shape, the narrow end being downward, in order to limit theamount of draft arising through it to a certain extent, and to preventan unnecessary loss of heatfrom the burner by radiation downward throughit.

The second tube, E, is also more or less conical or flaring 5 but itslarger end is downward, in order to admit an additional supply of draftair from below to enhance the combustion in the flame. The upper end isof less diameter, in order to enter the lower end of the next highertube a little distance, and that next tube is made broader at the bottomto receive the upper end of the tube'below and furnish space for theadmissionof more draft air. Then whatever the number of sue ceedingtubes above, they are all constructed and arranged substantially as thesecond tube, E, till the last tube, F, is reached, which may be eitherof the same shape as shown in Fig.3, or nearly cylindrical, as shown inFig. 1.

By means of these successive open tubes thus arranged, and in turnadmitting additional fresh draft-air, I am enabled not only to carry theflame upward as far as desired, but to make the combustion perfect anddiffuse the heat thereof through or upon the desired amount of space orsurface. Thus, for cooking, the heat is evenly spread out against thevessel or utensil, however large its sur face-as, for instance, in thecase ofthe gridiron 0, (shown in Fig. 1, and for heating the advantageis still more obvious, since the extended and enlarged flame radiates orconducts heat to the whole interior surface of the heatingdrum M, whichsurrounds the burner and draft-tubes.

The apparatus is supported by a suitable stand, A, which maybe largeenough to receive several burners. Upon this stand, for cooking, aremovable spider, I, is employed to support the cooking utentsils above,as indicated by the gravy-dish H, Fig. 1, of the broiler.

If the bottom of the apparatus around the burner is closed or coveredthere should be sut ficient apertures a a to admit the required supplyof draft air-from below to introduce into the flame-tubes.

In heating, if the flametubes and burner are inclosed by a closeradiating drum or case, M, there should be apertures N N through it ator near the top to allow the free escape of the products of combustion 5or, if desired, a pipe may be employed to conduct them to the flue ofthe chimney or out of doors.

What I claim as my invention, and desire to secure by Letters Patent,is-- 1. The open inverted conical tube D around the burner O, incombination therewith, and with open tubes D E F, as described, with awith the tubes E F, arranged and operating cooking or heating apparatusor utensil.

substantially as and for the purpose herein The above specificationsigned by me this specified. 9th day of January, 1866.

2. The succession of open tubes E 1 formed, JOHN S. HULL.

arranged, and operating substantially as and XVitnesses:

for the purpose herein set forth. T. J. TELNEY, 3. The combination of aburner provided JNo. SKIDD;

